[PATCH] drivers/mfd/sm501.c: fix an off-by-one

Fix an off-by-one spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Vincent Sanders <vince@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mfd/sm501.c

@@ -319,7 +319,7 @@ int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
 
 	mode &= 3;		/* get current power mode */
 
-	if (unit > ARRAY_SIZE(sm->unit_power)) {
+	if (unit >= ARRAY_SIZE(sm->unit_power)) {
 		dev_err(dev, "%s: bad unit %d\n", __FUNCTION__, unit);
 		goto already;
 	}